Oil burner



May 28, 1935. H. L. FISCHER OIL BURNER Filed Oct; 3, 1932 VISA/To HIS HTTOPMGKS Patented May 28, 1935 011. BURNER. v v Henry L. Fischer; East St". Louis, 111., assignor in Eagle Foundry Company, Belleville, 111., a cor- -poratin of Illinois ApplicationOctober 3,

4 Claims.

jects tosecure a more complete and perfect com-. bustion by, a more uniform distribution of the.

air flowing. to the fire pot, to provide an oil pilot, to preheat and vaporize the oil passing through the oil supply pipe and to provide for simplicity andcheapness of construction and compactness of design. The invention consists in the oil burner and in the construction, combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification and wherein like symbols refer to like parts wherever they occur,

Fig. 1 is a plan view of an oil burner embodying my invention,

Fig. 2 is a vertical longitudinal section on the line 22 in Fig. 1; and

Fig. 3 is a vertical transverse section on the line 33 in Fig. 1.

My oil burner comprises an oval-shaped casting supported on legs I and containing a fire pot 2 that is surrounded by a suitable casing 3, forming a chamber 4 beneath the bottom and around thesides of said fire pot. Air under pressure is supplied to the lower portion of the chamber 4 by means of a duct 5 leading from a fan or blower 6 driven by an electric motor I. Oil is supplied to the lower portion of the fire pot through a pipe 8 or conduit leading from a suitable source of oil supply through the air duct 5. The electric motor I is a two-speed motor that is controlled by a suitable room thermostat (not shown) so as to operate at either high or low speed in accordance with temperature requirements. A suitable magnetic by-pass valve 9 is also located in the oil supply pipe 8 for supplying a full flow of oil to the fire pot when the motor is operating at high speed and for supplying a smaller amount of oil to provide an oil pilot when the motor is operating at low speed and the main oil supply is cut on. The usual regulator valve It is also located in the oil line for regulating the fiow of oil therethrough; and a suitable constant level valve I I is located in the oil supply pipe for maintaining the desired depth of oil in the fire pot. The fan, motor, magnetic by-pass valve, regulator valve and constant level valve areall mounted on a suitable stand I2 provided with supporting legs I3.

1932, Serial No. 535,940 I Extending upwardly from the bottom ofxthe fire pot 2 adjacent to the centerthereof arertwo air conduits I 4 which communicate at their lower ends with the portion of the air chamber 4-;10-

cated beneath said fire pot. The twoupstanding .5;

air conduits l4 extend above the side walls otthe fire pot and have their upper; ends capped by a single distributor head I5 having downwardly extending tubular portions I6 that fit within the upper ends of said upstanding, air conduits; :The 10;

distributor head I5 is provided. with a caplfl, which is removably secured inposition by means of bolts I8 that pass throughjholes provided there, for in lugs that serve to space said cap far enough above the lower portion of said head to form a horizontal air discharge opening I9 that extends continuously around the same. Additional air is supplied around the upper edge of the fire pot by means of a series of openings 2| which are formed in the top of the casing 3 and 20 lead from the upper portion of the air chamber 4. Excessive outward spreading of the air that is delivered around the upper edge of the fire pot is prevented by an upwardly and outwardly inclined flange 22 at the upper corner of the cas- 5 ing 3. Air from the chamber 4 is supplied to the interior of the fire pot through two horizontally disposed pipes or conduits 23 that extend inwardly from opposite ends of the fire pot on each side of the distributor head I5 and are provided with a series of longitudinally spaced air discharge openings 23a. These air supply pipes 23 are located substantially midway between the top and bottom of the fire pot just above the level of the pool of oil therein. A pipe or conduit 24 com- 'municates at one end with the upper portion of the air chamber 4 and at its other end with the oil supply pipe 8 adjacent to the discharge end thereof. The pipe 24 serves to supply hot air from the air chamber 4 to the discharge end of 40 the oil supply pipe and thus tends to heat and vaporize the oil passing therethrough.

By the arrangement described, it will be seen that air is delivered by the fan 6 to the air chamber and after being heated by the heat from the fire pot, is uniformly distributed inside the fire pot above the fire pot and around the outer edge thereof. Thus, air supplied to the interior of the fire pot mixes with the vapors from the body of oil in the bottom thereof and forms a combustible mixture which is partly burnt therein. The unburned oil vapors are then commingled with the air streams above the pot and around the edges thereof where they are thoroughly vaporized or atomized and a complete and final combustion PAT ENT OFFIC E IQ- f.

occurs. The pipe 24 leading from the air chamber 4 to the discharge end of the oil supply line 8 serves to supply warm air to said pipe, thereby tending to heat and vaporize the oil passing therethrough. This supply of hot air to the oil supply pipe is particularly advantageous when only enough oil is flowing through said pipes to furnish an oil pilotrlight, such hot air tending to heat and-vaporize such oil and thus insure combustion thereof. I

Obviously, the hereinbefore described oil burner admits of considerable modification without de parting from my invention. Therefore, I do not wish to be limited to the precise construction shown and described.

What I claim is: 1. An oil burner comprising a fire pot having an air chamber surrounding the bottom and sides thereof, means for delivering air to said chamber, an oil supply pipe opening into said fire pot, a conduit leading upwardly from said air chamber through the bottom of said fire pot, an outlet head at the upper end of said conduit, said chamber being provided with outlet openings adjacent to the upper edge of said fire pot, and a plurality of horizontally disposed pipes located inside said fire pot and communicating therewith and with said'chamber. Y

2, An oil burner comprising a fire pot having an air chamber surrounding the'bottom and sides thereof, means for delivering air to said chamber, an oilsupply pipe opening into said fire pot, a conduit leading upwardly from said air chamber through the bottom of said fire pot, a discharge head for said conduit, horizontally disposed pipes located inside said fire pot and communicating with said chamber, and a pipe located outside of said chamber and communicating at one end with said chamber adjacent to the top thereof and at the other end with said oil supply pipe adjacent to the discharge end thereof.

3 An oil burner comprising'an ovalfire pot having a chamber surrounding the bottom and sides thereof, means for supplying air to said chamber, an oil supply pipe opening into said pot, an air discharge pipe leading upwardly from said chamber through the bottom of said fire pot, and a plurality of horizontally arranged air discharge pipes disposed inside of said pot on each side of said upwardly extending discharge pipe and communicating with the portion of said chamber which surrounds the sides of said fire pot.

4. An oil burner comprising an oval fire pot having a chamber surrounding the bottom and sides thereof, means for supplying air to said chamber, an oil supply pipe opening'into saidi pot, an air discharge pipe leading upwardly from said chamber through the bottom of said fire pot, and a plurality of horizontally arranged air discharge pipes disposed inside of said pot on each side of said upwardly extending discharge pipe and communicating with said chamber, said pipes extending longitudinally of said pot from opposite ends thereof.

HENRY L. FISCHER. 

